如何在多列中生成下拉组合框？

I have search about this subject, but only have found the need of fill various columns with one comboBoxItem. What I need is a list of a single column, warpped in various columns to shorten the overall length of the comboBox and in addition set some headers to delimit sections to make easier the search of one item. Here a example of wath I'm looking for:I have search about this subject, but only have